700R4 swap
Thread Starter
Instructor
Joined: Aug 2005
Posts: 225
Likes: 0
700R4 swap
Has any one done the 700R4 outo gearbox swap into a 1978 C3 Corvette ,was it worth it or will it better to upgrade the TH350 with stall converter
Regards
J Smit
mopkop@netvigator.com
Regards
J Smit
mopkop@netvigator.com
Intermediate
Joined: Mar 2009
Posts: 44
Likes: 0
imo
I personally am not a fan of the 200r4 (with respect shown, they make different options because ppl have different opinions and favs). first i dont find they're as easy to find second i find it easier to build up a 700 and i like the gearing on the 700. i did do a 700 swap in my vette and yes it was WELL worth it. the trick is not to get a stock one or a rebuild of an earlier one. the early ones 82-85 were not as strong of a tranny. the 700 is no beast in stock form, but built right i think its the perfect overdrive tranny. i really needed something to help because im running 4.10s. i also have the b&m lockup kit for the converter, i used the crossmember from bowtie overdrives, everything bolted up beautifully. you would also need to remove three inches from your driveshaft ( the difference between the two tranny's ). good luck with what ever you decide, there are plenty of options with tranny swaps each to fit what different people prefer. if you need anything pertaining to the 700 swap just pm me and ill help all i can.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
you may have to elongate the mounting holes to the rear a tad, but you MAY have a location choice on that support... with your car being automatic, mine was welded in....
Melting Slicks
Joined: Jul 2005
Posts: 2,060
Likes: 46
From: winter haven florida
St. Jude Donor '12
i just did a 200 4r swap on my 75 and it was a simple bolt in. the mount fit with no problems. i bolted it to the crossmember and lifted it up into place. i like the gearing in the 200 better than the 700. the 700 has a lower first gear but that translates to a very wide 1 to 2 shift. the 200 is spaced more evenly and the overdrive is a little better. meaning lower rpms at cruise than the 700. you can have a 200 4r built to handle quite a bit of power.
Melting Slicks
Joined: Jul 2005
Posts: 2,060
Likes: 46
From: winter haven florida
St. Jude Donor '12
nope, my stock crossmember slid right into place with the trans attached. i am using my stock driveshaft with a custom yoke. a corvette th350 yoke will work though. bto sells them. i have 1390 u joints so i had to go with a yoke from riverside gear to work with my set up but if you are staying stock all you need is a tv cable and 4 speed shifter. the bto tv made easy system is a great set up.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
Instructor
Joined: May 2009
Posts: 180
Likes: 1
From: Prairieville Louisiana
